*Find the measure of an interior angle of a regular polygon with 15 sides. Round to the nearest tenth if necessary.*

I know the answer is 156, but i'm not sure how they get that answer?
Could somebody explain?

Step-by-step explanation:

Finding a regular polygon with x amount of sides, you use the equation to find the amount of triangles. Replace x with 15 and you will get 13. Each triangle has angles that add to , so you would do 180 * 13 to find the total of all of the interior angles, = 2340. Then, divide 2340 by 15, and you will get 156!

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0